Can you build muscle
without free weights?

The resistance comes with me.

For Concierge Strength, I’ll come to your home in Cary with one Beyond Power VOLTRA I, a handle, and portable mounting equipment. Much of our training will use its cable, with one arm working at a time. In the first article, I explained that choice. Here, I want to address another reasonable question: can a device I carry into your house help you build muscle?

The VOLTRA uses a motor to produce electronically controlled resistance. We select the setting, attach a handle, and work against the cable. Its portability comes from how it produces resistance; you still have physical work to do.

Building muscle without free weights is possible. Whether this particular setup fits you depends on the exercises we can perform, how challenging we can make them, and how we develop your training over time.

The featured paper

Researchers measured muscle, not just effort.

A 2023 study by Hernández-Belmonte and colleagues followed 38 resistance-trained men for eight weeks. Half trained with free weights and half with machines, using corresponding versions of four exercises. Researchers used ultrasound to measure muscle size.

This was a short study of trained men using gym equipment. It did not test a VOLTRA, a single-handle home program, or the people I’ll coach in Cary. Applying it here requires judgment about those differences.

The useful question is what we can do with it.

For our sessions, I’ll start by finding exercises that let you work the intended muscles from a stable position. A cable curl from a suitable low mount, for example, asks something different of your setup than a press from an elevated mount. The free home assessment helps us choose the positions and mounting options we can actually use.

Then I’ll choose a resistance setting and repetition target with you. I want a demanding set that you can perform with a repeatable movement. I’ll watch the repetitions and ask how much more you felt you could have done. If keeping your balance or holding the position becomes the main difficulty, we’ll reconsider the exercise or setup.

The digital setting is useful because we can record it and adjust it. For this part of the program, I can begin with a straightforward resistance setting and keep it consistent while we learn the movement. The heavier return shown in our homepage demonstration is a separate programming option; we don’t need it to explain the basic idea.

Suppose your records start to look like that example across comparable sessions. I might raise the resistance slightly and reassess, or keep the setting while we work on consistency. The choice comes from what I see and what your records suggest. I won’t require the number to increase at every visit.

A higher number needs an explanation.

My statistics background matters here because the numbers need context. I’ll record the exercise, side, resistance, repetitions, and reported effort. For the VOLTRA, the mount position and your position matter too. If those change, I want that noted before comparing sessions.

I’ll review the records between visits. Are you doing more under comparable conditions? Is one exercise progressing while another repeatedly stalls? Are we shortening the movement to finish the set? Those questions help me decide what to keep, what to adjust, and what to discuss with you.

More repetitions are evidence about performance, not a direct measurement of muscle growth. As a statistician, I want us to be clear about what we measured. If changing your physique is a priority, we’ll agree how to assess that separately rather than treating a rising resistance setting as proof.

A compact setup still has limits.

The service needs to fit your goals and your home. Some exercises may require mounting options you don’t have. Others may become awkward to load enough as you get stronger. If we reach those limits, I’ll explain them and discuss a different exercise or equipment option.

I chose the VOLTRA because I can bring adjustable resistance into your home and build a program around it. Its value in our sessions will depend on how well that program fits your goals and how you respond. Coaching and reviewing your progress are part of what you’re hiring me to do.